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#pragma once
#include <yql/essentials/ast/yql_expr.h>
#include <yql/essentials/core/yql_type_annotation.h>
namespace NYql {
struct TPredicateExtractorSettings {
TMaybe<size_t> MaxRanges = 10000; // should be less than Max<size_t>() due to integer overflow
bool MergeAdjacentPointRanges = true;
bool HaveNextValueCallable = false;
bool BuildLiteralRange = false;
std::function<bool(const NYql::TExprNode::TPtr&)> IsValidForRange;
// Specify the external parameter limits to ensure better ExpectedMaxRanges
// calculations.
// These requirements allow the predicate extract library to remove
// the residual filter in queries with parameters and optimize query execution.
// Users must verify these requirements externally,
// as if these parameters are not met, the extract predicate may produce incorrect
// lambda expressions without a residual filter, leading to incorrect results.
TMaybe<size_t> ExternalParameterMaxSize;
};
class IPredicateRangeExtractor {
public:
using TPtr = THolder<IPredicateRangeExtractor>;
virtual bool Prepare(const TExprNode::TPtr& filterLambda, const TTypeAnnotationNode& rowType,
THashSet<TString>& possibleIndexKeys, TExprContext& ctx, TTypeAnnotationContext& typesCtx) = 0;
struct TBuildResult {
TExprNode::TPtr ComputeNode;
TExprNode::TPtr PrunedLambda;
size_t UsedPrefixLen = 0;
size_t PointPrefixLen = 0;
TMaybe<size_t> ExpectedMaxRanges;
size_t ExternalParameterMaxSizesLookups = 0;
struct TLiteralRange {
struct TLiteralRangeBound {
bool Inclusive = false;
TVector<TExprNode::TPtr> Columns;
};
TLiteralRangeBound Left;
TLiteralRangeBound Right;
};
TMaybe<TLiteralRange> LiteralRange;
};
virtual TBuildResult BuildComputeNode(const TVector<TString>& indexKeys, TExprContext& ctx, TTypeAnnotationContext& typesCtx) const = 0;
virtual ~IPredicateRangeExtractor() = default;
};
IPredicateRangeExtractor::TPtr MakePredicateRangeExtractor(const TPredicateExtractorSettings& settings = {});
TExprNode::TPtr BuildPointsList(const IPredicateRangeExtractor::TBuildResult&, TConstArrayRef<TString> keyColumns, NYql::TExprContext& expCtx);
}
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